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Co3O4 nanometer material for supercapacitor and preparation method thereof

A technology of cobalt tetroxide and supercapacitor, applied in the direction of cobalt oxide/cobalt hydroxide, nanotechnology, etc., to achieve the effects of excellent cycle performance, not easy to agglomerate, and high stability

Inactive Publication Date: 2012-07-04
ZHENGZHOU UNIVERSITY OF LIGHT INDUSTRY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the sea urchin-like Co 3 o 4 The preparation of microspheres and their application in electrochemical performance have not been reported yet, and this kind of material with the advantages of one-dimensional and three-dimensional nanostructures must have great application value in energy storage and other fields

Method used

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  • Co3O4 nanometer material for supercapacitor and preparation method thereof
  • Co3O4 nanometer material for supercapacitor and preparation method thereof
  • Co3O4 nanometer material for supercapacitor and preparation method thereof

Examples

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Effect test

Embodiment 1

[0021] Weigh 1g of cobalt nitrate hexahydrate, add 30mL of distilled water and stir to disperse for 10 minutes, measure 10mL of ethylene glycol and add to the above solution, dissolve 0.1g of glucose into the above solution, stir magnetically at room temperature in air for 30 minutes, and the obtained The mixed solution was placed in an autoclave with a polytetrafluoroethylene liner and sealed, kept at a constant temperature of 120°C for 15 hours, the product was washed three times with distilled water and absolute ethanol, and dried in vacuum at 80°C for 12 hours. The dried product was calcined in a muffle furnace at 300° C. for 2 hours to obtain sea urchin-like nanospheres with a three-dimensional hierarchical structure of cobalt tetroxide.

[0022] figure 1 For the XRD spectrum of the nanomaterial obtained in this example, the diffraction peaks in the figure correspond well to the diffraction peaks of tricobalt tetroxide, and the spectra match, which proves that the produc...

Embodiment 2

[0024] Weigh 1g of cobalt nitrate hexahydrate, add 20mL of distilled water and stir to disperse for 10 minutes, measure 20mL of ethylene glycol and add to the above solution, dissolve 0.1g of glucose into the above solution, stir magnetically at room temperature in air for 30 minutes, and the obtained The mixed solution was put into an autoclave with a polytetrafluoroethylene liner and sealed, kept at a constant temperature of 150 °C for 15 hours, the product was washed three times with distilled water and absolute ethanol, and dried in vacuum at 80 °C for 12 h. The dried product was calcined in a muffle furnace at 300° C. for 2 hours to obtain sea urchin-like nanospheres with a three-dimensional hierarchical structure of cobalt tetroxide.

Embodiment 3

[0026] Weigh 1g of cobalt nitrate hexahydrate, add 10mL of distilled water and stir to disperse for 10 minutes, measure 30mL of ethylene glycol and add to the above solution, dissolve 0.1g of glucose into the above solution, stir magnetically at room temperature in air for 30 minutes, and the obtained The mixed solution was placed in an autoclave with a polytetrafluoroethylene liner and sealed, kept at a constant temperature of 200°C for 15 hours, the product was washed three times with distilled water and absolute ethanol, and dried in vacuum at 80°C for 12 hours. The dried product was calcined in a muffle furnace at 250° C. for 2 hours to obtain sea urchin-like nanospheres with a three-dimensional hierarchical structure of cobalt tetroxide.

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Abstract

The invention discloses a Co3O4 nanometer material for a supercapacitor and a preparation method thereof. The method comprises the following steps: on the basis of using cobalt nitrate as a raw material and a mixture of ethylene glycol and water as a solvent, adding a defined amount of glucose, placing the mixture in an autoclave to react at 120-200 DEG C for 10-25 hours, performing suction filtering, drying at 80 DEG C, calcining in a muffle furnace at 300 DEG C to obtain Co3O4 sea urchin-shaped conjoined spheres which have the diameter of 7-15mu m and are of a three-dimensional hierarchical structure. The Co3O4 nanometer material and the preparation method have the characteristics that the operation method is simple, the yield is high, and the product has the three-dimensional hierarchical structure and superior electrochemical performance. The prepared Co3O4 spheres with the three-dimensional hierarchical structure have the characteristics that the stability is higher, the particle size distribution is uniform, the dispersibility is good, the spheres are difficult in agglomeration and pores with the three-dimensional structure are beneficial to the diffusion of the electrolyte, thus the material can be widely applied in the fields of catalysis, lithium batteries and supercapacitors.

Description

technical field [0001] The invention relates to a cobalt trioxide nanometer material for a supercapacitor and a preparation method thereof, belonging to the field of inorganic non-metallic materials. Background technique [0002] With the development of social economy, people pay more and more attention to green energy and ecological environment. As a new type of energy storage device, supercapacitors are increasingly valued. Compared with various energy storage devices widely used at present, the charge storage capacity of supercapacitors is much higher than that of physical capacitors, and the charging and discharging speed and efficiency are better than primary or secondary batteries. In addition, supercapacitors also have the characteristics of no pollution to the environment, long cycle life, wide operating temperature range, and high safety. The core of the development of supercapacitor technology is the electrode material. At present, carbon materials, metal oxides...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G51/04B82Y40/00
Inventor 李峰肖元化刘少军张永辉张爱勤卢灵珍赵继红
Owner ZHENGZHOU UNIVERSITY OF LIGHT INDUSTRY
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